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nidae, Myriozoidae, Escharella, Escharoides, Porella, Onychocella and Callopora. On 

 the other hand, the rosette-plates show variations in the families Flustridae, 

 Membraniporidae, Cribrilinidae and Microporidae, but in still higher degree in the 

 genera Schizoporella and Smittina. In these some species have single-pored, others 

 multiporous, and again others mixed rosette-plates, and colonies from different 

 localities may show a distinct difference in the number of pores in the rosette- 

 plates e. g. in Schizop. unicornis, Sch. sanguinea and Sch. longirostris. 



